make configurations like frog-none do the right thing: call frog, but don't

tools/testing/dart/test_suite.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 790 matching lines @@
   }
 
   List<List<String>> argumentListsFromFile(String filename,
                                            Map optionsFromFile) {
     List args = TestUtils.standardOptions(configuration);
     args.addAll(additionalOptions(filename));
     if (configuration['compiler'] == 'dartc') {
       args.add('--error_format');
       args.add('machine');
     }
+    if ((configuration['compiler'] == 'frog'
+          || configuration['compiler'] == 'frogsh'
+          || configuration['compiler'] == 'dart2js')
+        && (configuration['runtime'] == 'none')) {
+      args.add('--compile-only');
+    }
 
     bool isMultitest = optionsFromFile["isMultitest"];
     List<String> dartOptions = optionsFromFile["dartOptions"];
     List<List<String>> vmOptionsList = optionsFromFile["vmOptions"];
     Expect.isTrue(!isMultitest || dartOptions == null);
     if (dartOptions == null) {
       args.add(filename);
     } else {
       var executable_name = dartOptions[0];
       // TODO(ager): Get rid of this hack when the runtime checkout goes away.
@@ skipping 529 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }